// A user who never dictated must not pay a boot-warmed whisper-server (~210MB resident for 10
// minutes after every boot); the first real transcription writes the marker that unlocks boot-warm
// for every later boot. The gate must sit in FRONT of model resolution so an unused install does
// zero work, and behind it the no-model refusal still guards the 190MB silent download.
const { test } = require('node:test');
const assert = require('node:assert');
const fs = require('fs');
const os = require('os');
const path = require('path');
const whisperService = require('./voice/whisperService');

function freshDirs() {
  const base = fs.mkdtempSync(path.join(os.tmpdir(), 'osw-whisper-'));
  const res = path.join(base, 'res');
  const data = path.join(base, 'data');
  fs.mkdirSync(res); fs.mkdirSync(data);
  return { res, data };
}

test('never-dictated install skips boot warm even with a model on disk', () => {
  const { res, data } = freshDirs();
  const fakeModel = path.join(res, 'fake-model.bin');
  fs.writeFileSync(fakeModel, 'x');
  process.env.OPENSWARM_WHISPER_MODEL = fakeModel;
  try {
    assert.strictEqual(whisperService.hasBeenUsed(data), false);
    assert.strictEqual(whisperService.warmInBackground(res, data), false);
  } finally {
    delete process.env.OPENSWARM_WHISPER_MODEL;
  }
});

test('the first transcription marker unlocks boot warm', () => {
  const { res, data } = freshDirs();
  const fakeModel = path.join(res, 'fake-model.bin');
  fs.writeFileSync(fakeModel, 'x');
  process.env.OPENSWARM_WHISPER_MODEL = fakeModel;
  try {
    whisperService.markUsed(data);
    assert.strictEqual(whisperService.hasBeenUsed(data), true);
    assert.strictEqual(whisperService.warmInBackground(res, data), true);
  } finally {
    delete process.env.OPENSWARM_WHISPER_MODEL;
    whisperService.stopServer();
  }
});

test('marker alone does not defeat the no-model download guard', () => {
  const { res, data } = freshDirs();
  whisperService.markUsed(data);
  assert.strictEqual(whisperService.warmInBackground(res, data), false);
});

// The boot prefetch is the other half: it may download, but only where a whisper-server can ever
// run the file, never over an env override, never twice, and never once the pick is already on disk.
test('prefetch refuses when no whisper-server binary is reachable', () => {
  const { res, data } = freshDirs();
  const saved = process.env.OPENSWARM_WHISPER_BIN;
  delete process.env.OPENSWARM_WHISPER_BIN;
  try {
    if (fs.existsSync('/opt/homebrew/bin/whisper-server')) return; // a brew install on this machine is a reachable engine; the next test covers the decision
    assert.strictEqual(whisperService.prefetchModel(res, data), false);
  } finally {
    if (saved !== undefined) process.env.OPENSWARM_WHISPER_BIN = saved;
  }
});

test('prefetch skips an env-pinned model and an already-installed pick', () => {
  const { res, data } = freshDirs();
  const fakeBin = path.join(res, 'whisper-server');
  fs.writeFileSync(fakeBin, '#!/bin/sh\n');
  const fakeModel = path.join(res, 'fake-model.bin');
  fs.writeFileSync(fakeModel, 'x');
  process.env.OPENSWARM_WHISPER_MODEL = fakeModel;
  try {
    assert.strictEqual(whisperService.prefetchModel(res, data), false);
  } finally {
    delete process.env.OPENSWARM_WHISPER_MODEL;
  }
  const whisperModels = require('./voice/whisperModels');
  const m = whisperModels.MODELS.find((x) => x.id === whisperModels.DEFAULT_MODEL_ID);
  fs.mkdirSync(path.join(data, 'whisper'), { recursive: true });
  const f = fs.openSync(path.join(data, 'whisper', m.file), 'w');
  fs.ftruncateSync(f, m.bytes);
  fs.closeSync(f);
  assert.strictEqual(whisperModels.isInstalled(data, m.id), true);
  assert.strictEqual(whisperService.prefetchModel(res, data), false);
});